Always used in standard mode, and removes use of arguments.callee.

Were only for ancient IE, and prevent bfcache from being used.

behaviour of the associated Handler.Feature and Handler.Box (e.g.
changing whether the Handler.Feature swallows particular events).

Does not change behaviour.

The previous commits fix the issue where a touchstart was causing the
feature handler to fire, which then could confuse other handlers that
thought the touch was still happening (leading to multi-touch events,
e.g. the map zooming when you tried to pan it). However, dragging the
map starting on a feature then did nothing. We flip the flag to start
propagating these events, which allows dragging on features to work.

The incorrect bracket placement meant that touch events were not being
cancelled should you move your finger, meaning e.g. a zoom would still
occur if you touched a zoom, moved your finger off, then lifted.